Blade for well-drilling devices



P. W. SMITH AND1. J. BUOKHOUT.

BLADE FOR WELL DRILLING GEVICES. APPHCATIUN FILED MAR 21. 1921 FR WELL-DRELLNG Ta ai? whom 'it may concer/n Be ii; know haf: "We, PRlMUs WN. SMH'H and JOHN' l BGOKHOUT, citizens of the Unied Satemesdng @.5 Dallas, in the @Gumy of Daag and Sismi@ si Temghave :nvened Cerwin new :md useful mprove ments in Blades m Wrel'ling Bevices, @if which the following is a speciczton.

This; venton @Mies to new and usel mpmifenens in bia-ies fr Wel dxfing fa vices.

The :subjimatter of' the pzesen; inve-nis shown in *abe application mawrimg im@ Pzlen #1,370,492, issuei Us undef laf/e of March 1,` 1921, but no' camad 'evren.

the cutting blade a Suic'nfz bearing n. suppm as to adequaey sustain it tindex vazfous drng condions and to' Gaus-e it 'to give a maxmmn service. fm impoftant iu'anmge of ih-e nvenoarssus imm a structm@ Wwwny a, mng 'blade Hwy 'ue sai amp wrange fo'f the sawing;

its support?, 0 provide edgaia Y features of h@ invention. a n "w be mme readily une stom! Imm u read uff of ih@ folmvng sped- C@ *ko zhe nccompay iw dmwilggs im Wnch im example of vih@ @ration is shown wherein:

is an elevation of :L chilling device 1921., Serial H0.

may be suiaby formed ish-59e ne? pipe, fo. )amt or other mamrufi. Ai; the up 'M and of ih@ membe l() a.

56mm ghem'e socket 11 s provided 03 the ie- 6@ vice with a line oid-3m, pipa. Tg1@ fqfwr @n of the" member l() ae of vee inwardly to form im ncmd undelcu seat, 14, and the bc-Ie of h@ meme Ef medatey'abuve the seat is screw 'h-e im E@ ceve the upper screw ''ueade end tubuar support l Sum) annua collar 16 `p`1"ef1fiib1 i; with, and po'vde imp D dowmwardy inclined 31; u'lerc-a, mmf seat 17. H will be sem hat he l@ and 17 diverge and foym a dvelta sima between.v A threaded nppe ds imm he support nmedftajgf beexv in milan'L A tubular extenmmw 'pipe 23 s 'cewed onto the Rppli: and screwed im@ a collar' 25' at its wer and whisk. cave a filling todi 2 fsf any dimmen The support cnau U3, uppe @et e tension 23 may b designae h@ 10W section of the device. Thaise ins @me and amplydeamf bed in the afar 1" Paten. and are reafered *L0 explain the present m'en der; @mh

surround ich@ Enr-mbe? i5.; hmmm?, neeessarj tha h@ Shanks ever, that the shank )be prevented from creeping or moving eircumferentially of the supportl 15. By unscrewing the member tingedges or cutters 22,'. are formed by bev# cling and reducing the blades, whereb the cuttersv project in advance of; the blade proper. lt will be `noticed that the upper portion of each cutter is' reduced upwardly" from a shoulder 18 whereby the blade is given ample clearance to work efficiently.

'lt is to be' understood, however, that the cutters of the blades may assume any de sired shape, and the invention'is nottobe limited to any: particular shape or inclina tion. It is pointed out that the blades are substantially equidistant from the center of the member 15, so as to drill ahole concentric to the device. Particular stress is placed `tend through the col ar 16 from the bore ot" desired.

u on' the structure of the blade and the amp ej bearing afforded by its shank 19. Each shank is supported on the seat 17 and anyl upward thrust is sustained by the seat 14. The arcuate face 20 gives an ample bearing against the support 15.y The bladesare securely fastened. and cannot possibly have any playl on .their support; however the blades may be readily andl easily removed.

ln using the device with a rotary drilling machine, water'underpressure is supplied to the member 10 and passed down through the bore of the support 15 to the extension lt'rom which it is conveyed to 'the usual ports 26 in the drilling bits. In' s me formations it will be necessary to sup y water tothe cutters 22 to cleanse the same. A plurality of downwardl directed ports 27 ex the member l5 tothe lower edge oi' said collar so as to direct )ets ot water on the cutters. When it is not desired-to use said ports they may beI closed by screwing plugs 28 thereinto, the same to be removed when The device`r may be constructed without the ports 2f?.

lt isobvious that a character will bore the well much faster, thus savingtime and labor. rlhe bit 26 or other tool will make a rat tail or other smaller hole in advancesand will leave mere- 1y the rim or ledge for the blades to cut.4 vIt is equally plain that the cutters 22 may be drilling device of thisgiven any desired'angularity so] as to eut either a ri ht an lar shoulder or an in clined shou der. yl means of the advanced drill 'the device is Aconstantly centered and caused to. axially rotate, thus obviatinig swinging, 'whereby enlarging of the hole is prevented.

Various changes maybe made in the conf. struction ofthe blade and it is to be under stood that the invention is not to be limited. to the "exact supporting structure herein shown.' The invention is not limited to a plurality of blades and may be used in connection with .drilling devices or toolsemploying only. one blade. Various other changes and moditications may be `made without departing from the spirit of the inw and a blade member extending laterally from the shank and depending therefrom, the

lower end of the member being reduced and provided with a transverse cutter.

2. A. blade for well drillingr devices including` a blade member formed upon curved shank, said blai'i'einenbr being oil! set laterally and outwardly with relation to the-` curved shank and depending below the same, said blade member being provided at its lower end with a cutter. v

'3. A' blade for well drilling devices including'.y a shank, a blade member disposed. along the outer side of the shank with. the

shank' projecting beyond the opposite sides ot'the blade member, said blade member being integral with and projecting laterally i beyond the shank and extending downwarrb ly beyond the shank, said blade 'member being provided near its lower end withfa cutter.

4. A blade for well drilling devices, including, a4 shank, a'blade memberl formed integral with the shank and projecting' radially beyond the same, said blade member extending downwardly below the shank and having,r a cutter at its forward end, said blade .member being;r laterally reduced from a point near and spaced from the edge ot' the cutter to the upper end of thc blade member.

ln testimony whereof we aiiix our signatures.'v

PRI-MUS W. Sil/HTH, l JOHN J. BOOKH'UUT.

Miti 

